diff options
author | David S. Miller <davem@sunset.davemloft.net> | 2005-10-14 22:44:32 +0200 |
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committer | David S. Miller <davem@sunset.davemloft.net> | 2005-10-14 22:44:32 +0200 |
commit | f75884d28a6eae5a422d0454b982da3842f777af (patch) | |
tree | ff69ee62cc3f6a21ef6454de79edfdffbe4561fd | |
parent | [SPARC64]: Eliminate PCI IOMMU dma mapping size limit. (diff) | |
download | linux-f75884d28a6eae5a422d0454b982da3842f777af.tar.xz linux-f75884d28a6eae5a422d0454b982da3842f777af.zip |
[QLOGICPTI]: Handle INQUIRY response sniffing correctly.
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>
-rw-r--r-- | drivers/scsi/qlogicpti.c | 39 |
1 files changed, 35 insertions, 4 deletions
diff --git a/drivers/scsi/qlogicpti.c b/drivers/scsi/qlogicpti.c index a917ab7475ac..1fd5fc6d0fe3 100644 --- a/drivers/scsi/qlogicpti.c +++ b/drivers/scsi/qlogicpti.c @@ -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); |