Commit ed4eac20 authored by Denis Bolotin's avatar Denis Bolotin Committed by David S. Miller

qed: Fix reading wrong value in loop condition

The value of "sb_index" is written by the hardware. Reading its value and
writing it to "index" must finish before checking the loop condition.
Signed-off-by: default avatarDenis Bolotin <denis.bolotin@cavium.com>
Signed-off-by: default avatarMichal Kalderon <michal.kalderon@cavium.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 291d57f6
...@@ -992,6 +992,8 @@ static int qed_int_attentions(struct qed_hwfn *p_hwfn) ...@@ -992,6 +992,8 @@ static int qed_int_attentions(struct qed_hwfn *p_hwfn)
*/ */
do { do {
index = p_sb_attn->sb_index; index = p_sb_attn->sb_index;
/* finish reading index before the loop condition */
dma_rmb();
attn_bits = le32_to_cpu(p_sb_attn->atten_bits); attn_bits = le32_to_cpu(p_sb_attn->atten_bits);
attn_acks = le32_to_cpu(p_sb_attn->atten_ack); attn_acks = le32_to_cpu(p_sb_attn->atten_ack);
} while (index != p_sb_attn->sb_index); } while (index != p_sb_attn->sb_index);
......
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