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authorEddie James <eajames@linux.ibm.com>2019-08-27 12:12:49 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-08-28 22:59:18 +0200
commit8919dfcb31161fae7d607bbef5247e5e82fd6457 (patch)
tree0a59771afbe3b0cdd1bc18a5123cbb8c71610567
parent468e0ffac803f5557a62a33b72ef8844d1bfdc08 (diff)
downloadlinux-8919dfcb31161fae7d607bbef5247e5e82fd6457.tar.bz2
fsi: scom: Don't abort operations for minor errors
The scom driver currently fails out of operations if certain system errors are flagged in the status register; system checkstop, special attention, or recoverable error. These errors won't impact the ability of the scom engine to perform operations, so the driver should continue under these conditions. Also, don't do a PIB reset for these conditions, since it won't help. Fixes: 6b293258cded ("fsi: scom: Major overhaul") Signed-off-by: Eddie James <eajames@linux.ibm.com> Cc: stable <stable@vger.kernel.org> Acked-by: Jeremy Kerr <jk@ozlabs.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Joel Stanley <joel@jms.id.au> Link: https://lore.kernel.org/r/20190827041249.13381-1-jk@ozlabs.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/fsi/fsi-scom.c8
1 files changed, 1 insertions, 7 deletions
diff --git a/drivers/fsi/fsi-scom.c b/drivers/fsi/fsi-scom.c
index 343153d47e5b..004dc03ccf09 100644
--- a/drivers/fsi/fsi-scom.c
+++ b/drivers/fsi/fsi-scom.c
@@ -38,8 +38,7 @@
#define SCOM_STATUS_PIB_RESP_MASK 0x00007000
#define SCOM_STATUS_PIB_RESP_SHIFT 12
-#define SCOM_STATUS_ANY_ERR (SCOM_STATUS_ERR_SUMMARY | \
- SCOM_STATUS_PROTECTION | \
+#define SCOM_STATUS_ANY_ERR (SCOM_STATUS_PROTECTION | \
SCOM_STATUS_PARITY | \
SCOM_STATUS_PIB_ABORT | \
SCOM_STATUS_PIB_RESP_MASK)
@@ -251,11 +250,6 @@ static int handle_fsi2pib_status(struct scom_device *scom, uint32_t status)
/* Return -EBUSY on PIB abort to force a retry */
if (status & SCOM_STATUS_PIB_ABORT)
return -EBUSY;
- if (status & SCOM_STATUS_ERR_SUMMARY) {
- fsi_device_write(scom->fsi_dev, SCOM_FSI2PIB_RESET_REG, &dummy,
- sizeof(uint32_t));
- return -EIO;
- }
return 0;
}