Messages in this thread Patch in this message | | | From | Alex Elder <> | Subject | [PATCH net-next v2 2/4] net: ipa: use upper_32_bits() | Date | Thu, 18 Mar 2021 08:51:39 -0500 |
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Use upper_32_bits() to extract the high-order 32 bits of a DMA address. This avoids doing a 32-position shift on a DMA address if it happens not to be 64 bits wide.
Suggested-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Alex Elder <elder@linaro.org> --- v2: - Switched to use the existing function, as suggested by Florian.
drivers/net/ipa/gsi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ipa/gsi.c b/drivers/net/ipa/gsi.c index 2119367b93ea9..82c5a0d431ee5 100644 --- a/drivers/net/ipa/gsi.c +++ b/drivers/net/ipa/gsi.c @@ -711,7 +711,7 @@ static void gsi_evt_ring_program(struct gsi *gsi, u32 evt_ring_id) val = evt_ring->ring.addr & GENMASK(31, 0); iowrite32(val, gsi->virt + GSI_EV_CH_E_CNTXT_2_OFFSET(evt_ring_id)); - val = evt_ring->ring.addr >> 32; + val = upper_32_bits(evt_ring->ring.addr); iowrite32(val, gsi->virt + GSI_EV_CH_E_CNTXT_3_OFFSET(evt_ring_id)); /* Enable interrupt moderation by setting the moderation delay */ @@ -819,7 +819,7 @@ static void gsi_channel_program(struct gsi_channel *channel, bool doorbell) val = channel->tre_ring.addr & GENMASK(31, 0); iowrite32(val, gsi->virt + GSI_CH_C_CNTXT_2_OFFSET(channel_id)); - val = channel->tre_ring.addr >> 32; + val = upper_32_bits(channel->tre_ring.addr); iowrite32(val, gsi->virt + GSI_CH_C_CNTXT_3_OFFSET(channel_id)); /* Command channel gets low weighted round-robin priority */ -- 2.27.0
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