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authorRobert Baldyga <r.baldyga@samsung.com>2013-09-19 11:50:18 +0200
committerFelipe Balbi <balbi@ti.com>2013-10-15 08:43:22 -0500
commit5cb2ff0cdd60aef07c592a9d09349b5993fdf9b4 (patch)
tree69e287ebeec75718665cf26329e17ba7f6288af5 /drivers/usb/gadget/s3c-hsotg.c
parentab93e014f35374a8169b0f465fccee69e04ea34c (diff)
usb: gadget: s3c-hsotg: fix s3c_hsotg_write_fifo function for dedicated fifo mode
In s3c_hsotg_write_fifo function PTxFEmp/NPTxFEmp interrupts are enabled only in shared-fifo mode. In dedicated-fifo mode they should not be used (when enabled then cause interrupt storm). Signed-off-by: Robert Baldyga <r.baldyga@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/gadget/s3c-hsotg.c')
-rw-r--r--drivers/usb/gadget/s3c-hsotg.c16
1 files changed, 10 insertions, 6 deletions
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index 4faf5e70e093..bb173852ae4c 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -563,9 +563,11 @@ static int s3c_hsotg_write_fifo(struct s3c_hsotg *hsotg,
if (to_write > max_transfer) {
to_write = max_transfer;
- s3c_hsotg_en_gsint(hsotg,
- periodic ? GINTSTS_PTxFEmp :
- GINTSTS_NPTxFEmp);
+ /* it's needed only when we do not use dedicated fifos */
+ if (!hsotg->dedicated_fifos)
+ s3c_hsotg_en_gsint(hsotg,
+ periodic ? GINTSTS_PTxFEmp :
+ GINTSTS_NPTxFEmp);
}
/* see if we can write data */
@@ -590,9 +592,11 @@ static int s3c_hsotg_write_fifo(struct s3c_hsotg *hsotg,
* is more room left.
*/
- s3c_hsotg_en_gsint(hsotg,
- periodic ? GINTSTS_PTxFEmp :
- GINTSTS_NPTxFEmp);
+ /* it's needed only when we do not use dedicated fifos */
+ if (!hsotg->dedicated_fifos)
+ s3c_hsotg_en_gsint(hsotg,
+ periodic ? GINTSTS_PTxFEmp :
+ GINTSTS_NPTxFEmp);
}
dev_dbg(hsotg->dev, "write %d/%d, can_write %d, done %d\n",