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mtd: rawnand: brcmnand: skip DMA during panic write

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When oops_panic_write is set, the driver disables interrupts and
switches to PIO polling mode but still falls through into the DMA
path. DMA cannot be used reliably in panic context, so make the
DMA path an else branch to ensure only PIO is used during panic
writes.

Fixes: c1ac2dc34b ("mtd: rawnand: brcmnand: When oops in progress use pio and interrupt polling")
Signed-off-by: Kamal Dasu <kamal.dasu@broadcom.com>
Reviewed-by: William Zhang <william.zhang@broadcom.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
This commit is contained in:
Kamal Dasu 2026-03-05 15:21:57 -05:00 committed by Miquel Raynal
parent bab2bc6e85
commit da9ba4dcc0
1 changed files with 2 additions and 4 deletions
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6
drivers/mtd/nand/raw/brcmnand/brcmnand.c
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@ -2350,14 +2350,12 @@ static int brcmnand_write(struct mtd_info *mtd, struct nand_chip *chip,
for (i = 0; i < ctrl->max_oob; i += 4)
oob_reg_write(ctrl, i, 0xffffffff);
if (mtd->oops_panic_write)
if (mtd->oops_panic_write) {
/* switch to interrupt polling and PIO mode */
disable_ctrl_irqs(ctrl);
if (use_dma(ctrl) && (has_edu(ctrl) || !oob) && flash_dma_buf_ok(buf)) {
} else if (use_dma(ctrl) && (has_edu(ctrl) || !oob) && flash_dma_buf_ok(buf)) {
if (ctrl->dma_trans(host, addr, (u32 *)buf, oob, mtd->writesize,
CMD_PROGRAM_PAGE))
ret = -EIO;
goto out;