From 98e74212146e2191a9e6edb673b35389fd8f6aed Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Sat, 26 Apr 2014 11:53:44 +0200 Subject: [PATCH] USB: io_ti: fix firmware download on big-endian machines (part 2) commit c03890ff5e24a4bf59059f2d179f427559b7330a upstream. A recent patch that purported to fix firmware download on big-endian machines failed to add the corresponding sparse annotation to the i2c-header. This was reported by the kbuild test robot. Adding the appropriate annotation revealed another endianess bug related to the i2c-header Size-field in a code path that is exercised when the firmware is actually being downloaded (and not just verified and left untouched unless older than the firmware at hand). This patch adds the required sparse annotation to the i2c-header and makes sure that the Size-field is sent in little-endian byte order during firmware download also on big-endian machines. Note that this patch is only compile-tested, but that there is no functional change for little-endian systems. Reported-by: kbuild test robot Cc: Ludovic Drolez Signed-off-by: Johan Hovold Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/io_ti.c | 2 +- drivers/usb/serial/io_usbvend.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c index 5cca1b3..5175182 100644 --- a/drivers/usb/serial/io_ti.c +++ b/drivers/usb/serial/io_ti.c @@ -915,7 +915,7 @@ static int build_i2c_fw_hdr(__u8 *header, struct device *dev) firmware_rec = (struct ti_i2c_firmware_rec*)i2c_header->Data; i2c_header->Type = I2C_DESC_TYPE_FIRMWARE_BLANK; - i2c_header->Size = (__u16)buffer_size; + i2c_header->Size = cpu_to_le16(buffer_size); i2c_header->CheckSum = cs; firmware_rec->Ver_Major = OperationalMajorVersion; firmware_rec->Ver_Minor = OperationalMinorVersion; diff --git a/drivers/usb/serial/io_usbvend.h b/drivers/usb/serial/io_usbvend.h index 51f83fb..6f6a856 100644 --- a/drivers/usb/serial/io_usbvend.h +++ b/drivers/usb/serial/io_usbvend.h @@ -594,7 +594,7 @@ struct edge_boot_descriptor { struct ti_i2c_desc { __u8 Type; // Type of descriptor - __u16 Size; // Size of data only not including header + __le16 Size; // Size of data only not including header __u8 CheckSum; // Checksum (8 bit sum of data only) __u8 Data[0]; // Data starts here } __attribute__((packed)); -- 2.7.4