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ionic: fix fw_status read

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The fw_status field is only 8 bits, so fix the read.  Also,
we only want to look at the one status bit, to allow for future
use of the other bits, and watch for a bad PCI read.

Fixes: 97ca486592 ("ionic: add heartbeat check")
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Shannon Nelson 2020-02-19 14:59:42 -08:00 committed by David S. Miller
parent 98bda63e20
commit 68b759a75d
2 changed files with 8 additions and 4 deletions
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11
drivers/net/ethernet/pensando/ionic/ionic_dev.c
View File

@ -103,7 +103,7 @@ int ionic_heartbeat_check(struct ionic *ionic)
{
struct ionic_dev *idev = &ionic->idev;
unsigned long hb_time;
u32 fw_status;
u8 fw_status;
u32 hb;
/* wait a little more than one second before testing again */
@ -111,9 +111,12 @@ int ionic_heartbeat_check(struct ionic *ionic)
if (time_before(hb_time, (idev->last_hb_time + ionic->watchdog_period)))
return 0;
/* firmware is useful only if fw_status is non-zero */
fw_status = ioread32(&idev->dev_info_regs->fw_status);
if (!fw_status)
/* firmware is useful only if the running bit is set and
* fw_status != 0xff (bad PCI read)
*/
fw_status = ioread8(&idev->dev_info_regs->fw_status);
if (fw_status == 0xff ||
!(fw_status & IONIC_FW_STS_F_RUNNING))
return -ENXIO;
/* early FW has no heartbeat, else FW will return non-zero */

1
drivers/net/ethernet/pensando/ionic/ionic_if.h
View File

@ -2445,6 +2445,7 @@ union ionic_dev_info_regs {
u8 version;
u8 asic_type;
u8 asic_rev;
#define IONIC_FW_STS_F_RUNNING 0x1
u8 fw_status;
u32 fw_heartbeat;
char fw_version[IONIC_DEVINFO_FWVERS_BUFLEN];