[PATCH 14/22] scsi: arcmsr, ips, megaraid: Make use of the new sg_map helper function
From: Logan Gunthorpe <hidden>
Date: 2017-04-13 22:06:55
Also in:
dri-devel, intel-gfx, linux-crypto, linux-media, linux-mmc, linux-raid, linux-rdma, linux-scsi, lkml, nvdimm
Subsystem:
ibm serveraid raid driver, ips scsi raid driver, megaraid scsi/sas drivers, scsi subsystem, the rest · Maintainers:
Adaptec OEM Raid Solutions, Kashyap Desai, Sumit Saxena, Shivasharan S, Chandrakanth patil, "James E.J. Bottomley", "Martin K. Petersen", Linus Torvalds
Very straightforward conversion of three scsi drivers Signed-off-by: Logan Gunthorpe <logang-OTvnGxWRz7hWk0Htik3J/w@public.gmane.org> --- drivers/scsi/arcmsr/arcmsr_hba.c | 16 ++++++++++++---- drivers/scsi/ips.c | 8 ++++---- drivers/scsi/megaraid.c | 9 +++++++-- 3 files changed, 23 insertions(+), 10 deletions(-)
diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
index af032c4..3cd485c 100644
--- a/drivers/scsi/arcmsr/arcmsr_hba.c
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c@@ -2306,7 +2306,10 @@ static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb, use_sg = scsi_sg_count(cmd); sg = scsi_sglist(cmd); - buffer = kmap_atomic(sg_page(sg)) + sg->offset; + buffer = sg_map(sg, SG_KMAP_ATOMIC); + if (IS_ERR(buffer)) + return ARCMSR_MESSAGE_FAIL; + if (use_sg > 1) { retvalue = ARCMSR_MESSAGE_FAIL; goto message_out;
@@ -2539,7 +2542,7 @@ static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb, message_out: if (use_sg) { struct scatterlist *sg = scsi_sglist(cmd); - kunmap_atomic(buffer - sg->offset); + sg_unmap(sg, buffer, SG_KMAP_ATOMIC); } return retvalue; }
@@ -2590,11 +2593,16 @@ static void arcmsr_handle_virtual_command(struct AdapterControlBlock *acb, strncpy(&inqdata[32], "R001", 4); /* Product Revision */ sg = scsi_sglist(cmd); - buffer = kmap_atomic(sg_page(sg)) + sg->offset; + buffer = sg_map(sg, SG_KMAP_ATOMIC); + if (IS_ERR(buffer)) { + cmd->result = (DID_ERROR << 16); + cmd->scsi_done(cmd); + return; + } memcpy(buffer, inqdata, sizeof(inqdata)); sg = scsi_sglist(cmd); - kunmap_atomic(buffer - sg->offset); + sg_unmap(sg, buffer, SG_KMAP_ATOMIC); cmd->scsi_done(cmd); }
diff --git a/drivers/scsi/ips.c b/drivers/scsi/ips.c
index 3419e1b..a44291d 100644
--- a/drivers/scsi/ips.c
+++ b/drivers/scsi/ips.c@@ -1506,14 +1506,14 @@ static int ips_is_passthru(struct scsi_cmnd *SC) /* kmap_atomic() ensures addressability of the user buffer.*/ /* local_irq_save() protects the KM_IRQ0 address slot. */ local_irq_save(flags); - buffer = kmap_atomic(sg_page(sg)) + sg->offset; - if (buffer && buffer[0] == 'C' && buffer[1] == 'O' && + buffer = sg_map(sg, SG_KMAP_ATOMIC); + if (!IS_ERR(buffer) && buffer[0] == 'C' && buffer[1] == 'O' && buffer[2] == 'P' && buffer[3] == 'P') { - kunmap_atomic(buffer - sg->offset); + sg_unmap(sg, buffer, SG_KMAP_ATOMIC); local_irq_restore(flags); return 1; } - kunmap_atomic(buffer - sg->offset); + sg_unmap(sg, buffer, SG_KMAP_ATOMIC); local_irq_restore(flags); } return 0;
diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c
index 3c63c29..0b66e50 100644
--- a/drivers/scsi/megaraid.c
+++ b/drivers/scsi/megaraid.c@@ -663,10 +663,15 @@ mega_build_cmd(adapter_t *adapter, Scsi_Cmnd *cmd, int *busy) struct scatterlist *sg; sg = scsi_sglist(cmd); - buf = kmap_atomic(sg_page(sg)) + sg->offset; + buf = sg_map(sg, SG_KMAP_ATOMIC); + if (IS_ERR(buf)) { + cmd->result = (DID_ERROR << 16); + cmd->scsi_done(cmd); + return NULL; + } memset(buf, 0, cmd->cmnd[4]); - kunmap_atomic(buf - sg->offset); + sg_unmap(sg, buf, SG_KMAP_ATOMIC); cmd->result = (DID_OK << 16); cmd->scsi_done(cmd);
--
2.1.4