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scsi: ses: make page2 support optional

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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>
This commit is contained in:
Hannes Reinecke 2017-08-15 10:21:43 +02:00 committed by Martin K. Petersen
parent 81b59d7565
commit dc56ce12d5
1 changed files with 38 additions and 1 deletions
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39
drivers/scsi/ses.c
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@ -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;