mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 13:55:32 +00:00
mtd: nand: pxa3xx_nand: fix early spurious interrupt
When the nand is first probe, and upon the first command start, the status bits should be cleared before the interrupts are unmasked. The bug is tricky : if the bootloader left a status bit set, the unmasking of interrupts does trigger the interrupt handler before the first command is issued, blocking the good behavior of the nand. The same would happen if in pxa3xx_nand code flow a status bit is left, and then a command is started. Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Acked-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> Tested-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
parent
bc3e00f04c
commit
0b14392db2
1 changed files with 1 additions and 1 deletions
|
@ -442,8 +442,8 @@ static void pxa3xx_nand_start(struct pxa3xx_nand_info *info)
|
|||
ndcr |= NDCR_ND_RUN;
|
||||
|
||||
/* clear status bits and run */
|
||||
nand_writel(info, NDCR, 0);
|
||||
nand_writel(info, NDSR, NDSR_MASK);
|
||||
nand_writel(info, NDCR, 0);
|
||||
nand_writel(info, NDCR, ndcr);
|
||||
}
|
||||
|
||||
|
|
Loading…
Reference in a new issue