Skip to contentSkip to conversation

mmc: block: Change MMC_IOC_MAX_BYTES

PATCH In review Jeremy Kim 2 participants 3 messages Oct 18, 2016 MMC, SD and SDIO

lore
Share & tools
lore

Jeremy Kim

author
#0 lore raw

PATCH 1/1 mmc: block: Change MMC_IOC_MAX_BYTES

It is used for limitation of buffer size during IOCTL such as FFU. However, eMMC FW size is bigger than (512L*256).
(For instance, currently, Samsung eMMC FW size is over 300KB.) So, it needs to increase to execute FFU.

Signed-off-by Jeonghan Kim <[email protected]>
---
 ioctl.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
ioctl.h +1 -1
index 7e385b8..700a551 100644
@@ -69,6 +69,6 @@ struct mmc_ioc_multi_cmd {
  * is enforced per ioctl call.  For larger data transfers, use the normal
  * block device operations.
  */
-#define MMC_IOC_MAX_BYTES  (512L * 256)
+#define MMC_IOC_MAX_BYTES  (512L * 1024)
 #define MMC_IOC_MAX_CMDS    255
 #endif /* LINUX_MMC_IOCTL_H */

--
1.9.1

#1 lore raw

Hi,

Quoted 11 lines · Jeremy Kim

It is used for limitation of buffer size during IOCTL such as FFU. However, eMMC FW size is bigger than (512L*256).
(For instance, currently, Samsung eMMC FW size is over 300KB.) So, it needs to increase to execute FFU.

Signed-off-by Jeonghan Kim <[email protected]>
---
 ioctl.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Where is ioctl.h? "include/uapi/linux/mmc/ioctl.h"?

Best Regards,
Jaehoon Chung

Quoted 23 lines
ioctl.h +1 -2
index 7e385b8..700a551 100644
@@ -69,6 +69,6 @@ struct mmc_ioc_multi_cmd {
  * is enforced per ioctl call.  For larger data transfers, use the normal
  * block device operations.
  */
-#define MMC_IOC_MAX_BYTES  (512L * 256)
+#define MMC_IOC_MAX_BYTES  (512L * 1024)
 #define MMC_IOC_MAX_CMDS    255
 #endif /* LINUX_MMC_IOCTL_H */
--

1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html

author
#2 lore raw

Hi,

Yes, right. "include/uapi/linux/mmc/ioctl.h"

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Jaehoon Chung
Sent: Tuesday, October 18, 2016 7:52 PM
To: Jeremy Kim; [email protected]; [email protected]
Subject: Re: [PATCH] mmc: block: Change MMC_IOC_MAX_BYTES

Hi,

Quoted 11 lines · Jeremy Kim

It is used for limitation of buffer size during IOCTL such as FFU. However, eMMC FW size is bigger than (512L*256).
(For instance, currently, Samsung eMMC FW size is over 300KB.) So, it needs to increase to execute FFU.

Signed-off-by Jeonghan Kim <[email protected]>
---
 ioctl.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Where is ioctl.h? "include/uapi/linux/mmc/ioctl.h"?

Best Regards,
Jaehoon Chung

Quoted 16 lines
ioctl.h +1 -2
index 7e385b8..700a551 100644
@@ -69,6 +69,6 @@ struct mmc_ioc_multi_cmd {
  * is enforced per ioctl call.  For larger data transfers, use the normal
  * block device operations.
  */
-#define MMC_IOC_MAX_BYTES  (512L * 256)
+#define MMC_IOC_MAX_BYTES  (512L * 1024)
 #define MMC_IOC_MAX_CMDS    255
 #endif /* LINUX_MMC_IOCTL_H */
--

1.9.1

Quoted 7 lines

--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html

--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to [email protected] More majordomo info at
http://vger.kernel.org/majordomo-info.html