Messages in this thread Patch in this message | | | From | William Zhang <> | Subject | [PATCH v3 2/5] mtd: rawnand: brcmnand: Fix potential false time out warning | Date | Tue, 27 Jun 2023 12:37:35 -0700 |
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If system is busy during the command status polling function, the driver may not get the chance to poll the status register till the end of time out and return the premature status. Do a final check after time out happens to ensure reading the correct status.
Fixes: 9d2ee0a60b8b ("mtd: nand: brcmnand: Check flash #WP pin status before nand erase/program") Signed-off-by: William Zhang <william.zhang@broadcom.com> Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com> ---
Changes in v3: None Changes in v2: None
drivers/mtd/nand/raw/brcmnand/brcmnand.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index 69709419516a..37c2c7cfa00e 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -1080,6 +1080,14 @@ static int bcmnand_ctrl_poll_status(struct brcmnand_controller *ctrl, cpu_relax(); } while (time_after(limit, jiffies)); + /* + * do a final check after time out in case CPU is busy and driver does + * not get the enough time to poll to avoid false alarm + */ + val = brcmnand_read_reg(ctrl, BRCMNAND_INTFC_STATUS); + if ((val & mask) == expected_val) + return 0; + dev_warn(ctrl->dev, "timeout on status poll (expected %x got %x)\n", expected_val, val & mask); -- 2.37.3 [unhandled content-type:application/pkcs7-signature] | |