diff options
| author | Hannes Reinecke <hare@suse.de> | 2017-08-15 11:21:43 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2017-08-25 05:28:59 +0300 |
| commit | dc56ce12d50c0adc1243bd3d080133bc6b63f403 (patch) | |
| tree | d54b518c84cfb34ac21f629243446d3ed503f872 /drivers/scsi/ses.c | |
| parent | 81b59d7565b8703dfdf738e81e6dc0a417818000 (diff) | |
| download | linux-dc56ce12d50c0adc1243bd3d080133bc6b63f403.tar.xz | |
scsi: ses: make page2 support optional
Simple subenclosures do not need to support SES page 2, so make it
optional.
Signed-off-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/ses.c')
| -rw-r--r-- | drivers/scsi/ses.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/drivers/scsi/ses.c b/drivers/scsi/ses.c index c863c271c781..a3f935008cc1 100644 --- a/drivers/scsi/ses.c +++ b/drivers/scsi/ses.c @@ -51,6 +51,13 @@ struct ses_component { u64 addr; }; +static bool ses_page2_supported(struct enclosure_device *edev) +{ + struct ses_device *ses_dev = edev->scratch; + + return (ses_dev->page2 != NULL); +} + static int ses_probe(struct device *dev) { struct scsi_device *sdev = to_scsi_device(dev); @@ -204,6 +211,10 @@ static void ses_get_fault(struct enclosure_device *edev, { unsigned char *desc; + if (!ses_page2_supported(edev)) { + ecomp->fault = 0; + return; + } desc = ses_get_page2_descriptor(edev, ecomp); if (desc) ecomp->fault = (desc[3] & 0x60) >> 4; @@ -216,6 +227,9 @@ static int ses_set_fault(struct enclosure_device *edev, unsigned char desc[4]; unsigned char *desc_ptr; + if (!ses_page2_supported(edev)) + return -EINVAL; + desc_ptr = ses_get_page2_descriptor(edev, ecomp); if (!desc_ptr) @@ -243,6 +257,10 @@ static void ses_get_status(struct enclosure_device *edev, { unsigned char *desc; + if (!ses_page2_supported(edev)) { + ecomp->status = 0; + return; + } desc = ses_get_page2_descriptor(edev, ecomp); if (desc) ecomp->status = (desc[0] & 0x0f); @@ -253,6 +271,10 @@ static void ses_get_locate(struct enclosure_device *edev, { unsigned char *desc; + if (!ses_page2_supported(edev)) { + ecomp->locate = 0; + return; + } desc = ses_get_page2_descriptor(edev, ecomp); if (desc) ecomp->locate = (desc[2] & 0x02) ? 1 : 0; @@ -265,6 +287,9 @@ static int ses_set_locate(struct enclosure_device *edev, unsigned char desc[4]; unsigned char *desc_ptr; + if (!ses_page2_supported(edev)) + return -EINVAL; + desc_ptr = ses_get_page2_descriptor(edev, ecomp); if (!desc_ptr) @@ -293,6 +318,9 @@ static int ses_set_active(struct enclosure_device *edev, unsigned char desc[4]; unsigned char *desc_ptr; + if (!ses_page2_supported(edev)) + return -EINVAL; + desc_ptr = ses_get_page2_descriptor(edev, ecomp); if (!desc_ptr) @@ -329,6 +357,11 @@ static void ses_get_power_status(struct enclosure_device *edev, { unsigned char *desc; + if (!ses_page2_supported(edev)) { + ecomp->power_status = 0; + return; + } + desc = ses_get_page2_descriptor(edev, ecomp); if (desc) ecomp->power_status = (desc[3] & 0x10) ? 0 : 1; @@ -341,6 +374,9 @@ static int ses_set_power_status(struct enclosure_device *edev, unsigned char desc[4]; unsigned char *desc_ptr; + if (!ses_page2_supported(edev)) + return -EINVAL; + desc_ptr = ses_get_page2_descriptor(edev, ecomp); if (!desc_ptr) @@ -674,7 +710,7 @@ static int ses_intf_add(struct device *cdev, page = 2; result = ses_recv_diag(sdev, page, hdr_buf, INIT_ALLOC_SIZE); if (result) - goto recv_failed; + goto page2_not_supported; len = (hdr_buf[2] << 8) + hdr_buf[3] + 4; buf = kzalloc(len, GFP_KERNEL); @@ -707,6 +743,7 @@ static int ses_intf_add(struct device *cdev, ses_dev->page10_len = len; buf = NULL; } +page2_not_supported: scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL); if (!scomp) goto err_free; |