[SCSI] advansys: fix regression with request_firmware change

On newer kernels users of advansys module are reporting system hang when
trying to load it without firmware files present. After looking closely
at description on https://qa.mandriva.com/show_bug.cgi?id=53220, I think
this is related to commit "[SCSI] advansys: use request_firmware". The
problem is that after switch to request_firmware, asc_dvc->err_code
isn't being set when firmware files aren't found or loading fails.

err_code is used by the driver to judge if there was a fatal error or
not, as can be seen for example on advansys_board_found, which will only
return -ENODEV when err_code is set. Because err_code isn't being set
when request_firmware fails, this is a change of behaviour of the code
before request_firmware addition, making it continue to load and it
fails later as the firmware wasn't really loaded.

Signed-off-by: Herton Ronaldo Krzesinski <herton@mandriva.com.br>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/scsi/advansys.c b/drivers/scsi/advansys.c
index 22626abdb630..9201afe65609 100644
--- a/drivers/scsi/advansys.c
+++ b/drivers/scsi/advansys.c
@@ -4781,12 +4781,14 @@ static ushort AscInitAsc1000Driver(ASC_DVC_VAR *asc_dvc)
         if (err) {
                 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
                        fwname, err);
+                asc_dvc->err_code |= ASC_IERR_MCODE_CHKSUM;
                 return err;
         }
         if (fw->size < 4) {
                 printk(KERN_ERR "Bogus length %zu in image \"%s\"\n",
                        fw->size, fwname);
                 release_firmware(fw);
+                asc_dvc->err_code |= ASC_IERR_MCODE_CHKSUM;
                 return -EINVAL;
         }
         chksum = (fw->data[3] << 24) | (fw->data[2] << 16) |
@@ -5110,12 +5112,14 @@ static int AdvInitAsc3550Driver(ADV_DVC_VAR *asc_dvc)
         if (err) {
                 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
                        fwname, err);
+                asc_dvc->err_code = ASC_IERR_MCODE_CHKSUM;
                 return err;
         }
         if (fw->size < 4) {
                 printk(KERN_ERR "Bogus length %zu in image \"%s\"\n",
                        fw->size, fwname);
                 release_firmware(fw);
+                asc_dvc->err_code = ASC_IERR_MCODE_CHKSUM;
                 return -EINVAL;
         }
         chksum = (fw->data[3] << 24) | (fw->data[2] << 16) |
@@ -5624,12 +5628,14 @@ static int AdvInitAsc38C0800Driver(ADV_DVC_VAR *asc_dvc)
         if (err) {
                 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
                        fwname, err);
+                asc_dvc->err_code = ASC_IERR_MCODE_CHKSUM;
                 return err;
         }
         if (fw->size < 4) {
                 printk(KERN_ERR "Bogus length %zu in image \"%s\"\n",
                        fw->size, fwname);
                 release_firmware(fw);
+                asc_dvc->err_code = ASC_IERR_MCODE_CHKSUM;
                 return -EINVAL;
         }
         chksum = (fw->data[3] << 24) | (fw->data[2] << 16) |
@@ -6124,12 +6130,14 @@ static int AdvInitAsc38C1600Driver(ADV_DVC_VAR *asc_dvc)
         if (err) {
                 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
                        fwname, err);
+                asc_dvc->err_code = ASC_IERR_MCODE_CHKSUM;
                 return err;
         }
         if (fw->size < 4) {
                 printk(KERN_ERR "Bogus length %zu in image \"%s\"\n",
                        fw->size, fwname);
                 release_firmware(fw);
+                asc_dvc->err_code = ASC_IERR_MCODE_CHKSUM;
                 return -EINVAL;
         }
         chksum = (fw->data[3] << 24) | (fw->data[2] << 16) |