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Date: Sat, 5 Jul 2014 03:25:14 +0300
From: Andrey Utkin <andrey.krieger.utkin@...il.com>
To: kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org,
greg@...ah.com, marek.belisko@...il.com
Cc: Andrey Utkin <andrey.krieger.utkin@...il.com>
Subject: [PATCH] staging: ft1000-usb: check for errors in card_send_command
See https://bugzilla.kernel.org/show_bug.cgi?id=78561
---8<---
Reported-by: Maksymilian Arciemowicz <max@...t.cx>
Signed-off-by: Andrey Utkin <andrey.krieger.utkin@...il.com>
---
drivers/staging/ft1000/ft1000-usb/ft1000_debug.c | 6 +++---
drivers/staging/ft1000/ft1000-usb/ft1000_hw.c | 25 +++++++++++++++++-------
drivers/staging/ft1000/ft1000-usb/ft1000_usb.h | 2 +-
3 files changed, 22 insertions(+), 11 deletions(-)
diff --git a/drivers/staging/ft1000/ft1000-usb/ft1000_debug.c b/drivers/staging/ft1000/ft1000-usb/ft1000_debug.c
index a8945b7..9f4c785 100644
--- a/drivers/staging/ft1000/ft1000-usb/ft1000_debug.c
+++ b/drivers/staging/ft1000/ft1000-usb/ft1000_debug.c
@@ -482,14 +482,14 @@ static long ft1000_ioctl(struct file *file, unsigned int command,
/* Connect Message */
DEBUG("FT1000:ft1000_ioctl: IOCTL_FT1000_CONNECT\n");
ConnectionMsg[79] = 0xfc;
- card_send_command(ft1000dev, (unsigned short *)ConnectionMsg, 0x4c);
+ result = card_send_command(ft1000dev, (unsigned short *)ConnectionMsg, 0x4c);
break;
case IOCTL_DISCONNECT:
/* Disconnect Message */
DEBUG("FT1000:ft1000_ioctl: IOCTL_FT1000_DISCONNECT\n");
ConnectionMsg[79] = 0xfd;
- card_send_command(ft1000dev, (unsigned short *)ConnectionMsg, 0x4c);
+ result = card_send_command(ft1000dev, (unsigned short *)ConnectionMsg, 0x4c);
break;
case IOCTL_GET_DSP_STAT_CMD:
/* DEBUG("FT1000:ft1000_ioctl: IOCTL_FT1000_GET_DSP_STAT called\n"); */
@@ -652,7 +652,7 @@ static long ft1000_ioctl(struct file *file, unsigned int command,
}
pmsg++;
ppseudo_hdr = (struct pseudo_hdr *)pmsg;
- card_send_command(ft1000dev,(unsigned short*)dpram_data,total_len+2);
+ result = card_send_command(ft1000dev,(unsigned short*)dpram_data,total_len+2);
ft1000dev->app_info[app_index].nTxMsg++;
diff --git a/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c b/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c
index b6a7708..7012e09 100644
--- a/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c
+++ b/drivers/staging/ft1000/ft1000-usb/ft1000_hw.c
@@ -322,18 +322,23 @@ static void card_reset_dsp(struct ft1000_usb *ft1000dev, bool value)
* ptempbuffer - command buffer
* size - command buffer size
*/
-void card_send_command(struct ft1000_usb *ft1000dev, void *ptempbuffer,
+int card_send_command(struct ft1000_usb *ft1000dev, void *ptempbuffer,
int size)
{
+ int ret;
unsigned short temp;
unsigned char *commandbuf;
DEBUG("card_send_command: enter card_send_command... size=%d\n", size);
commandbuf = kmalloc(size + 2, GFP_KERNEL);
+ if (!commandbuf)
+ return -ENOMEM;
memcpy((void *)commandbuf + 2, (void *)ptempbuffer, size);
- ft1000_read_register(ft1000dev, &temp, FT1000_REG_DOORBELL);
+ ret = ft1000_read_register(ft1000dev, &temp, FT1000_REG_DOORBELL);
+ if (ret)
+ return ret;
if (temp & 0x0100)
usleep_range(900, 1100);
@@ -345,19 +350,23 @@ void card_send_command(struct ft1000_usb *ft1000dev, void *ptempbuffer,
if (size % 4)
size += 4 - (size % 4);
- ft1000_write_dpram32(ft1000dev, 0, commandbuf, size);
+ ret = ft1000_write_dpram32(ft1000dev, 0, commandbuf, size);
+ if (ret)
+ return ret;
usleep_range(900, 1100);
- ft1000_write_register(ft1000dev, FT1000_DB_DPRAM_TX,
+ ret = ft1000_write_register(ft1000dev, FT1000_DB_DPRAM_TX,
FT1000_REG_DOORBELL);
+ if (ret)
+ return ret;
usleep_range(900, 1100);
- ft1000_read_register(ft1000dev, &temp, FT1000_REG_DOORBELL);
+ ret = ft1000_read_register(ft1000dev, &temp, FT1000_REG_DOORBELL);
#if 0
if ((temp & 0x0100) == 0)
DEBUG("card_send_command: Message sent\n");
#endif
-
+ return ret;
}
/* load or reload the DSP */
@@ -1375,8 +1384,10 @@ static int ft1000_proc_drvmsg(struct ft1000_usb *dev, u16 size)
*pmsg++ = convert.wrd;
*pmsg++ = htons(info->DrvErrNum);
- card_send_command(dev, (unsigned char *)&tempbuffer[0],
+ status = card_send_command(dev, (unsigned char *)&tempbuffer[0],
(u16)(0x0012 + PSEUDOSZ));
+ if (status)
+ goto out;
info->DrvErrNum = 0;
}
dev->DrvMsgPend = 0;
diff --git a/drivers/staging/ft1000/ft1000-usb/ft1000_usb.h b/drivers/staging/ft1000/ft1000-usb/ft1000_usb.h
index 2d4b02e..464e5ab 100644
--- a/drivers/staging/ft1000/ft1000-usb/ft1000_usb.h
+++ b/drivers/staging/ft1000/ft1000-usb/ft1000_usb.h
@@ -136,7 +136,7 @@ extern spinlock_t free_buff_lock;
int ft1000_create_dev(struct ft1000_usb *dev);
void ft1000_destroy_dev(struct net_device *dev);
-extern void card_send_command(struct ft1000_usb *ft1000dev,
+extern int card_send_command(struct ft1000_usb *ft1000dev,
void *ptempbuffer, int size);
struct dpram_blk *ft1000_get_buffer(struct list_head *bufflist);
--
1.8.3.2
--
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