luck/tmp_suning_uos_patched
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[MTD] DiskOnChip: Wait for the command to finish.

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Do not use the ready function here, as it might hang for ever. 
The result will show, whether the chip is there or not

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2005-02-22 21:48:25 +00:00 committed by Thomas Gleixner
parent fdf2fd5274
commit dfd6129440
1 changed files with 9 additions and 2 deletions
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11
drivers/mtd/nand/diskonchip.c
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@ -16,7 +16,7 @@
*
* Interface to generic NAND code for M-Systems DiskOnChip devices
*
* $Id: diskonchip.c,v 1.48 2005/01/31 22:22:21 gleixner Exp $
* $Id: diskonchip.c,v 1.49 2005/02/22 21:48:21 gleixner Exp $
*/
#include <linux/kernel.h>
@ -410,7 +410,12 @@ static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr)
doc200x_hwcontrol(mtd, NAND_CTL_SETALE);
this->write_byte(mtd, 0);
doc200x_hwcontrol(mtd, NAND_CTL_CLRALE);
/* We cant' use dev_ready here, but at least we wait for the
* command to complete
*/
udelay(50);
ret = this->read_byte(mtd) << 8;
ret |= this->read_byte(mtd);
@ -429,6 +434,8 @@ static uint16_t __init doc200x_ident_chip(struct mtd_info *mtd, int nr)
doc2000_write_byte(mtd, 0);
doc200x_hwcontrol(mtd, NAND_CTL_CLRALE);
udelay(50);
ident.dword = readl(docptr + DoC_2k_CDSN_IO);
if (((ident.byte[0] << 8) | ident.byte[1]) == ret) {
printk(KERN_INFO "DiskOnChip 2000 responds to DWORD access\n");