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| author |   Eddie James <eajames@linux.ibm.com> | 2021-03-29 10:13:44 -0500 |
|---|---|---|
| committer |   Joel Stanley <joel@jms.id.au> | 2021-06-04 14:19:48 +0930 |
| commit | a5c317dac5567206ca7b6bc9d008dd6890c8bced (patch) | |
| tree | c7c25ebb99d427466e4343859c6a1cd1983dd603 /drivers/fsi | |
| parent | fsi: aspeed: Emit fewer barriers in opb operations (diff) | |
| download | linux-dev-a5c317dac5567206ca7b6bc9d008dd6890c8bced.tar.xz linux-dev-a5c317dac5567206ca7b6bc9d008dd6890c8bced.zip | |
fsi: scom: Reset the FSI2PIB engine for any error
The error bits in the FSI2PIB status are only cleared by a reset. So
the driver needs to perform a reset after seeing any of the FSI2PIB
errors, otherwise subsequent operations will also look like failures.
Fixes: 6b293258cded ("fsi: scom: Major overhaul")
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20210329151344.14246-1-eajames@linux.ibm.com
Signed-off-by: Joel Stanley <joel@jms.id.au>
Diffstat (limited to 'drivers/fsi')
| -rw-r--r-- | drivers/fsi/fsi-scom.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/fsi/fsi-scom.c b/drivers/fsi/fsi-scom.c index b45bfab7b7f5..75d1389e2626 100644 --- a/drivers/fsi/fsi-scom.c +++ b/drivers/fsi/fsi-scom.c @@ -38,9 +38,10 @@ #define SCOM_STATUS_PIB_RESP_MASK 0x00007000 #define SCOM_STATUS_PIB_RESP_SHIFT 12 -#define SCOM_STATUS_ANY_ERR (SCOM_STATUS_PROTECTION | \ - SCOM_STATUS_PARITY | \ - SCOM_STATUS_PIB_ABORT | \ +#define SCOM_STATUS_FSI2PIB_ERROR (SCOM_STATUS_PROTECTION | \ + SCOM_STATUS_PARITY | \ + SCOM_STATUS_PIB_ABORT) +#define SCOM_STATUS_ANY_ERR (SCOM_STATUS_FSI2PIB_ERROR | \ SCOM_STATUS_PIB_RESP_MASK) /* SCOM address encodings */ #define XSCOM_ADDR_IND_FLAG BIT_ULL(63) @@ -240,13 +241,14 @@ static int handle_fsi2pib_status(struct scom_device *scom, uint32_t status) { uint32_t dummy = -1; - if (status & SCOM_STATUS_PROTECTION) - return -EPERM; - if (status & SCOM_STATUS_PARITY) { + if (status & SCOM_STATUS_FSI2PIB_ERROR) fsi_device_write(scom->fsi_dev, SCOM_FSI2PIB_RESET_REG, &dummy, sizeof(uint32_t)); + + if (status & SCOM_STATUS_PROTECTION) + return -EPERM; + if (status & SCOM_STATUS_PARITY) return -EIO; - } /* Return -EBUSY on PIB abort to force a retry */ if (status & SCOM_STATUS_PIB_ABORT) return -EBUSY; |