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path: root/drivers/scsi/ses.c
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Diffstat (limited to 'drivers/scsi/ses.c')
-rw-r--r--drivers/scsi/ses.c48
1 files changed, 27 insertions, 21 deletions
diff --git a/drivers/scsi/ses.c b/drivers/scsi/ses.c
index 7f5a6a86f820..eb7a3e85304f 100644
--- a/drivers/scsi/ses.c
+++ b/drivers/scsi/ses.c
@@ -35,9 +35,11 @@
struct ses_device {
unsigned char *page1;
+ unsigned char *page1_types;
unsigned char *page2;
unsigned char *page10;
short page1_len;
+ short page1_num_types;
short page2_len;
short page10_len;
};
@@ -110,12 +112,12 @@ static int ses_set_page2_descriptor(struct enclosure_device *edev,
int i, j, count = 0, descriptor = ecomp->number;
struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
struct ses_device *ses_dev = edev->scratch;
- unsigned char *type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11];
+ unsigned char *type_ptr = ses_dev->page1_types;
unsigned char *desc_ptr = ses_dev->page2 + 8;
/* Clear everything */
memset(desc_ptr, 0, ses_dev->page2_len - 8);
- for (i = 0; i < ses_dev->page1[10]; i++, type_ptr += 4) {
+ for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) {
for (j = 0; j < type_ptr[1]; j++) {
desc_ptr += 4;
if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
@@ -140,12 +142,12 @@ static unsigned char *ses_get_page2_descriptor(struct enclosure_device *edev,
int i, j, count = 0, descriptor = ecomp->number;
struct scsi_device *sdev = to_scsi_device(edev->edev.parent);
struct ses_device *ses_dev = edev->scratch;
- unsigned char *type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11];
+ unsigned char *type_ptr = ses_dev->page1_types;
unsigned char *desc_ptr = ses_dev->page2 + 8;
ses_recv_diag(sdev, 2, ses_dev->page2, ses_dev->page2_len);
- for (i = 0; i < ses_dev->page1[10]; i++, type_ptr += 4) {
+ for (i = 0; i < ses_dev->page1_num_types; i++, type_ptr += 4) {
for (j = 0; j < type_ptr[1]; j++) {
desc_ptr += 4;
if (type_ptr[0] != ENCLOSURE_COMPONENT_DEVICE &&
@@ -358,7 +360,7 @@ static void ses_enclosure_data_process(struct enclosure_device *edev,
unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL;
int i, j, page7_len, len, components;
struct ses_device *ses_dev = edev->scratch;
- int types = ses_dev->page1[10];
+ int types = ses_dev->page1_num_types;
unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
if (!hdr_buf)
@@ -390,10 +392,10 @@ static void ses_enclosure_data_process(struct enclosure_device *edev,
len = (desc_ptr[2] << 8) + desc_ptr[3];
/* skip past overall descriptor */
desc_ptr += len + 4;
- if (ses_dev->page10)
- addl_desc_ptr = ses_dev->page10 + 8;
}
- type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11];
+ if (ses_dev->page10)
+ addl_desc_ptr = ses_dev->page10 + 8;
+ type_ptr = ses_dev->page1_types;
components = 0;
for (i = 0; i < types; i++, type_ptr += 4) {
for (j = 0; j < type_ptr[1]; j++) {
@@ -503,6 +505,7 @@ static int ses_intf_add(struct device *cdev,
u32 result;
int i, types, len, components = 0;
int err = -ENOMEM;
+ int num_enclosures;
struct enclosure_device *edev;
struct ses_component *scomp = NULL;
@@ -530,16 +533,6 @@ static int ses_intf_add(struct device *cdev,
if (result)
goto recv_failed;
- if (hdr_buf[1] != 0) {
- /* FIXME: need subenclosure support; I've just never
- * seen a device with subenclosures and it makes the
- * traversal routines more complex */
- sdev_printk(KERN_ERR, sdev,
- "FIXME driver has no support for subenclosures (%d)\n",
- hdr_buf[1]);
- goto err_free;
- }
-
len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
buf = kzalloc(len, GFP_KERNEL);
if (!buf)
@@ -549,11 +542,24 @@ static int ses_intf_add(struct device *cdev,
if (result)
goto recv_failed;
- types = buf[10];
+ types = 0;
- type_ptr = buf + 12 + buf[11];
+ /* we always have one main enclosure and the rest are referred
+ * to as secondary subenclosures */
+ num_enclosures = buf[1] + 1;
- for (i = 0; i < types; i++, type_ptr += 4) {
+ /* begin at the enclosure descriptor */
+ type_ptr = buf + 8;
+ /* skip all the enclosure descriptors */
+ for (i = 0; i < num_enclosures && type_ptr < buf + len; i++) {
+ types += type_ptr[2];
+ type_ptr += type_ptr[3] + 4;
+ }
+
+ ses_dev->page1_types = type_ptr;
+ ses_dev->page1_num_types = types;
+
+ for (i = 0; i < types && type_ptr < buf + len; i++, type_ptr += 4) {
if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE)
components += type_ptr[1];
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