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Commit 73fd546a authored by Jens Axboe's avatar Jens Axboe
Browse files

SG: clear termination bit in sg_chain() 



Since we are using the last entry in the list, clear any possible
termination bit that may have already been set. Pointed out by Rusty.

Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent 2a397e82

include/linux/scatterlist.h

+5 −1
Original line number Diff line number Diff line
@@ -179,7 +179,11 @@ static inline void sg_chain(struct scatterlist *prv, unsigned int prv_nents, 
#ifndef ARCH_HAS_SG_CHAIN

	BUG();

#endif

	prv[prv_nents - 1].page_link = (unsigned long) sgl | 0x01;

	/*

	 * Set lowest bit to indicate a link pointer, and make sure to clear

	 * the termination bit if it happens to be set.

	 */

	prv[prv_nents - 1].page_link = ((unsigned long) sgl | 0x01) & ~0x02;

}



/**