[PATCH 5.10 087/130] net: marvell: mvpp2: Fix the computation of shared CPUs

Greg Kroah-Hartman
2021-12-06T15:30:39Z

From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

commit b83f5ac7d922e69a109261f5f940eebbd4e514c4 upstream.

'bitmap_fill()' fills a bitmap one 'long' at a time.
It is likely that an exact number of bits is expected.

Use 'bitmap_set()' instead in order not to set unexpected bits.

Fixes: e531f76757eb ("net: mvpp2: handle cases where more CPUs are available than s/w threads")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -6918,7 +6918,7 @@ static int mvpp2_probe(struct platform_d

shared = num_present_cpus() - priv->nthreads;
if (shared > 0)
- bitmap_fill(&priv->lock_map,
+ bitmap_set(&priv->lock_map, 0,
min_t(int, shared, MVPP2_MAX_THREADS));

for (i = 0; i < MVPP2_MAX_THREADS; i++) {