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authorGreg Kroah-Hartman <gregkh@suse.de>2011-12-09 15:53:33 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2011-12-09 15:53:33 -0800
commitc8d65d285ded76c2a12e2ad4c125a6876bfac1ea (patch)
treeb22240d330153b78b6ee90c7421d400f33330d09
parent1c2df545798745ec62c5e9668a927875136f0ece (diff)
- patches.drivers/usb-fix-number-of-mapped-sg-dma-entries.patch:rpm-3.0.13-0.5
usb: fix number of mapped SG DMA entries. suse-commit: 73c58d5921a95be38fbaab4b81b11f9ff2ecac43
-rw-r--r--drivers/usb/core/hcd.c5
-rw-r--r--drivers/usb/host/ehci-q.c2
-rw-r--r--drivers/usb/host/uhci-q.c2
-rw-r--r--drivers/usb/host/whci/qset.c4
-rw-r--r--drivers/usb/host/xhci-ring.c4
-rw-r--r--include/linux/usb.h1
6 files changed, 9 insertions, 9 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index b3b7d062906d..16fa9fd792d5 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -1412,11 +1412,10 @@ int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
ret = -EAGAIN;
else
urb->transfer_flags |= URB_DMA_MAP_SG;
- if (n != urb->num_sgs) {
- urb->num_sgs = n;
+ urb->num_mapped_sgs = n;
+ if (n != urb->num_sgs)
urb->transfer_flags |=
URB_DMA_SG_COMBINED;
- }
} else if (urb->sg) {
struct scatterlist *sg = urb->sg;
urb->transfer_dma = dma_map_page(
diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c
index 4e4066c35a09..fef1db3da37f 100644
--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -647,7 +647,7 @@ qh_urb_transaction (
/*
* data transfer stage: buffer setup
*/
- i = urb->num_sgs;
+ i = urb->num_mapped_sgs;
if (len > 0 && i > 0) {
sg = urb->sg;
buf = sg_dma_address(sg);
diff --git a/drivers/usb/host/uhci-q.c b/drivers/usb/host/uhci-q.c
index f6ca80ee4cec..d2c6f5ac4626 100644
--- a/drivers/usb/host/uhci-q.c
+++ b/drivers/usb/host/uhci-q.c
@@ -943,7 +943,7 @@ static int uhci_submit_common(struct uhci_hcd *uhci, struct urb *urb,
if (usb_pipein(urb->pipe))
status |= TD_CTRL_SPD;
- i = urb->num_sgs;
+ i = urb->num_mapped_sgs;
if (len > 0 && i > 0) {
sg = urb->sg;
data = sg_dma_address(sg);
diff --git a/drivers/usb/host/whci/qset.c b/drivers/usb/host/whci/qset.c
index a403b53e86b9..76083ae92138 100644
--- a/drivers/usb/host/whci/qset.c
+++ b/drivers/usb/host/whci/qset.c
@@ -443,7 +443,7 @@ static int qset_add_urb_sg(struct whc *whc, struct whc_qset *qset, struct urb *u
remaining = urb->transfer_buffer_length;
- for_each_sg(urb->sg, sg, urb->num_sgs, i) {
+ for_each_sg(urb->sg, sg, urb->num_mapped_sgs, i) {
dma_addr_t dma_addr;
size_t dma_remaining;
dma_addr_t sp, ep;
@@ -561,7 +561,7 @@ static int qset_add_urb_sg_linearize(struct whc *whc, struct whc_qset *qset,
remaining = urb->transfer_buffer_length;
- for_each_sg(urb->sg, sg, urb->num_sgs, i) {
+ for_each_sg(urb->sg, sg, urb->num_mapped_sgs, i) {
size_t len;
size_t sg_remaining;
void *orig;
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 9f1d4b15d818..d28c5865f3ef 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2561,7 +2561,7 @@ static unsigned int count_sg_trbs_needed(struct xhci_hcd *xhci, struct urb *urb)
struct scatterlist *sg;
sg = NULL;
- num_sgs = urb->num_sgs;
+ num_sgs = urb->num_mapped_sgs;
temp = urb->transfer_buffer_length;
xhci_dbg(xhci, "count sg list trbs: \n");
@@ -2745,7 +2745,7 @@ static int queue_bulk_sg_tx(struct xhci_hcd *xhci, gfp_t mem_flags,
return -EINVAL;
num_trbs = count_sg_trbs_needed(xhci, urb);
- num_sgs = urb->num_sgs;
+ num_sgs = urb->num_mapped_sgs;
total_packet_count = roundup(urb->transfer_buffer_length,
usb_endpoint_maxp(&urb->ep->desc));
diff --git a/include/linux/usb.h b/include/linux/usb.h
index 6f49a1b39fa6..3fd0d1aa1196 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -1220,6 +1220,7 @@ struct urb {
void *transfer_buffer; /* (in) associated data buffer */
dma_addr_t transfer_dma; /* (in) dma addr for transfer_buffer */
struct scatterlist *sg; /* (in) scatter gather buffer list */
+ int num_mapped_sgs; /* (internal) mapped sg entries */
int num_sgs; /* (in) number of entries in the sg list */
u32 transfer_buffer_length; /* (in) data buffer length */
u32 actual_length; /* (return) actual transfer length */