cmd640: fix deadlock on error handling
Stop abusing ide_lock lock (switch to a private locking).
Fixes same issue as fixed by Alan Cox in atiixp host driver with
commit 6c5f8cc33e
.
cmd640 is a bit special cause we still need to leave ide_lock for
->set_pio_mode with 'pio' argument == 8/9 (prefetch disable/enable).
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
parent
a482958bf6
commit
5bbcf9242d
@ -185,6 +185,8 @@ static u8 recovery_counts[4] = {16, 16, 16, 16}; /* Recovery count (encoded) */
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#endif /* CONFIG_BLK_DEV_CMD640_ENHANCED */
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static DEFINE_SPINLOCK(cmd640_lock);
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/*
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* These are initialized to point at the devices we control
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*/
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@ -258,12 +260,12 @@ static u8 get_cmd640_reg_vlb (u16 reg)
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static u8 get_cmd640_reg(u16 reg)
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{
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u8 b;
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unsigned long flags;
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u8 b;
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spin_lock_irqsave(&ide_lock, flags);
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spin_lock_irqsave(&cmd640_lock, flags);
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b = __get_cmd640_reg(reg);
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spin_unlock_irqrestore(&ide_lock, flags);
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spin_unlock_irqrestore(&cmd640_lock, flags);
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return b;
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}
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@ -271,9 +273,9 @@ static void put_cmd640_reg(u16 reg, u8 val)
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{
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unsigned long flags;
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spin_lock_irqsave(&ide_lock, flags);
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spin_lock_irqsave(&cmd640_lock, flags);
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__put_cmd640_reg(reg,val);
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spin_unlock_irqrestore(&ide_lock, flags);
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spin_unlock_irqrestore(&cmd640_lock, flags);
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}
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static int __init match_pci_cmd640_device (void)
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@ -351,7 +353,7 @@ static int __init secondary_port_responding (void)
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{
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unsigned long flags;
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spin_lock_irqsave(&ide_lock, flags);
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spin_lock_irqsave(&cmd640_lock, flags);
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outb_p(0x0a, 0x170 + IDE_SELECT_OFFSET); /* select drive0 */
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udelay(100);
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@ -359,11 +361,11 @@ static int __init secondary_port_responding (void)
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outb_p(0x1a, 0x170 + IDE_SELECT_OFFSET); /* select drive1 */
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udelay(100);
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if ((inb_p(0x170 + IDE_SELECT_OFFSET) & 0x1f) != 0x1a) {
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spin_unlock_irqrestore(&ide_lock, flags);
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spin_unlock_irqrestore(&cmd640_lock, flags);
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return 0; /* nothing responded */
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}
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}
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spin_unlock_irqrestore(&ide_lock, flags);
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spin_unlock_irqrestore(&cmd640_lock, flags);
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return 1; /* success */
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}
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@ -440,11 +442,11 @@ static void __init setup_device_ptrs (void)
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static void set_prefetch_mode (unsigned int index, int mode)
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{
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ide_drive_t *drive = cmd_drives[index];
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unsigned long flags;
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int reg = prefetch_regs[index];
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u8 b;
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unsigned long flags;
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spin_lock_irqsave(&ide_lock, flags);
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spin_lock_irqsave(&cmd640_lock, flags);
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b = __get_cmd640_reg(reg);
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if (mode) { /* want prefetch on? */
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#if CMD640_PREFETCH_MASKS
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@ -460,7 +462,7 @@ static void set_prefetch_mode (unsigned int index, int mode)
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b |= prefetch_masks[index]; /* disable prefetch */
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}
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__put_cmd640_reg(reg, b);
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spin_unlock_irqrestore(&ide_lock, flags);
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spin_unlock_irqrestore(&cmd640_lock, flags);
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}
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/*
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@ -561,7 +563,7 @@ static void program_drive_counts (unsigned int index)
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/*
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* Now that everything is ready, program the new timings
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*/
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spin_lock_irqsave(&ide_lock, flags);
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spin_lock_irqsave(&cmd640_lock, flags);
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/*
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* Program the address_setup clocks into ARTTIM reg,
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* and then the active/recovery counts into the DRWTIM reg
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@ -570,7 +572,7 @@ static void program_drive_counts (unsigned int index)
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setup_count |= __get_cmd640_reg(arttim_regs[index]) & 0x3f;
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__put_cmd640_reg(arttim_regs[index], setup_count);
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__put_cmd640_reg(drwtim_regs[index], pack_nibbles(active_count, recovery_count));
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spin_unlock_irqrestore(&ide_lock, flags);
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spin_unlock_irqrestore(&cmd640_lock, flags);
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}
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/*
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@ -630,6 +632,7 @@ static void cmd640_set_mode (unsigned int index, u8 pio_mode, unsigned int cycle
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static void cmd640_set_pio_mode(ide_drive_t *drive, const u8 pio)
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{
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unsigned long flags;
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unsigned int index = 0, cycle_time;
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u8 b;
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@ -652,7 +655,12 @@ static void cmd640_set_pio_mode(ide_drive_t *drive, const u8 pio)
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case 8: /* set prefetch off */
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case 9: /* set prefetch on */
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/*
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* take ide_lock for drive->[no_]unmask/[no_]io_32bit
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*/
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spin_lock_irqsave(&ide_lock, flags);
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set_prefetch_mode(index, pio & 1);
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spin_unlock_irqrestore(&ide_lock, flags);
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printk("%s: %sabled cmd640 prefetch\n", drive->name, (pio & 1) ? "en" : "dis");
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return;
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}
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@ -670,20 +678,20 @@ static void cmd640_set_pio_mode(ide_drive_t *drive, const u8 pio)
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static int pci_conf1(void)
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{
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u32 tmp;
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unsigned long flags;
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u32 tmp;
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spin_lock_irqsave(&ide_lock, flags);
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spin_lock_irqsave(&cmd640_lock, flags);
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outb(0x01, 0xCFB);
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tmp = inl(0xCF8);
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outl(0x80000000, 0xCF8);
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if (inl(0xCF8) == 0x80000000) {
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outl(tmp, 0xCF8);
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spin_unlock_irqrestore(&ide_lock, flags);
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spin_unlock_irqrestore(&cmd640_lock, flags);
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return 1;
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}
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outl(tmp, 0xCF8);
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spin_unlock_irqrestore(&ide_lock, flags);
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spin_unlock_irqrestore(&cmd640_lock, flags);
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return 0;
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}
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@ -691,15 +699,15 @@ static int pci_conf2(void)
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{
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unsigned long flags;
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spin_lock_irqsave(&ide_lock, flags);
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spin_lock_irqsave(&cmd640_lock, flags);
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outb(0x00, 0xCFB);
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outb(0x00, 0xCF8);
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outb(0x00, 0xCFA);
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if (inb(0xCF8) == 0x00 && inb(0xCF8) == 0x00) {
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spin_unlock_irqrestore(&ide_lock, flags);
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spin_unlock_irqrestore(&cmd640_lock, flags);
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return 1;
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}
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spin_unlock_irqrestore(&ide_lock, flags);
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spin_unlock_irqrestore(&cmd640_lock, flags);
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return 0;
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}
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