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[QLOGICPTI]: Handle INQUIRY response sniffing correctly.

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These days, in 2.6.x, even INQUIRY commands are sent using
scatter gather lists.

Bug reported by Tom 'spot' Callaway.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2005-10-14 13:44:32 -07:00
parent 688cb30bdc
commit f75884d28a
1 changed files with 35 additions and 4 deletions
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39
drivers/scsi/qlogicpti.c
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@ -1119,6 +1119,36 @@ static inline void update_can_queue(struct Scsi_Host *host, u_int in_ptr, u_int
host->sg_tablesize = QLOGICPTI_MAX_SG(num_free);
}
static unsigned int scsi_rbuf_get(struct scsi_cmnd *cmd, unsigned char **buf_out)
{
unsigned char *buf;
unsigned int buflen;
if (cmd->use_sg) {
struct scatterlist *sg;
sg = (struct scatterlist *) cmd->request_buffer;
buf = kmap_atomic(sg->page, KM_IRQ0) + sg->offset;
buflen = sg->length;
} else {
buf = cmd->request_buffer;
buflen = cmd->request_bufflen;
}
*buf_out = buf;
return buflen;
}
static void scsi_rbuf_put(struct scsi_cmnd *cmd, unsigned char *buf)
{
if (cmd->use_sg) {
struct scatterlist *sg;
sg = (struct scatterlist *) cmd->request_buffer;
kunmap_atomic(buf - sg->offset, KM_IRQ0);
}
}
/*
* Until we scan the entire bus with inquiries, go throught this fella...
*/
@ -1145,11 +1175,9 @@ static void ourdone(struct scsi_cmnd *Cmnd)
int ok = host_byte(Cmnd->result) == DID_OK;
if (Cmnd->cmnd[0] == 0x12 && ok) {
unsigned char *iqd;
unsigned int iqd_len;
if (Cmnd->use_sg != 0)
BUG();
iqd = ((unsigned char *)Cmnd->buffer);
iqd_len = scsi_rbuf_get(Cmnd, &iqd);
/* tags handled in midlayer */
/* enable sync mode? */
@ -1163,6 +1191,9 @@ static void ourdone(struct scsi_cmnd *Cmnd)
if (iqd[7] & 0x20) {
qpti->dev_param[tgt].device_flags |= 0x20;
}
scsi_rbuf_put(Cmnd, iqd);
qpti->sbits |= (1 << tgt);
} else if (!ok) {
qpti->sbits |= (1 << tgt);