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do_div is the wrong way to divide a sector_t, as it is less efficient
when sector_t is 32-bit wide. With the upcoming do_div optimizations,
the kernel starts warning about this:
drivers/memstick/core/ms_block.c: In function 'msb_io_work':
include/asm-generic/div64.h:207:28: warning: comparison of distinct pointer types lacks a cast
This changes the code to use sector_div instead, which always produces
optimal code.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Maxim Levitsky <maximlevitsky@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
In h_msb_read_page() in ms_block.c, flow never reaches case
MSB_RP_RECIVE_STATUS_REG. This causes error when MEMSTICK_INT_ERR is
encountered and status error bits are going to be examined, but the status
will never be copied back.
Fix it by transitioning to MSB_RP_RECIVE_STATUS_REG right after
MSB_RP_SEND_READ_STATUS_REG.
Signed-off-by: Roger Tseng <rogerable@realtek.com>
Acked-by: Maxim Levitsky <maximlevitsky@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Based partially on MS standard spec quotes from Alex Dubov.
As any code that works with user data this driver isn't recommended to use
to write cards that contain valuable data.
It tries its best though to avoid data corruption and possible damage to
the card.
Tested on MS DUO 64 MB card on Ricoh R592 card reader.
Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com>
Cc: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Alex Dubov <oakad@yahoo.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
