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leon, grcan: protect statistics on copy to user

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Locking the stats structure when copying to user buffer ensures a consistent
view to the user.
This commit is contained in:
Martin Aberg
2017-03-13 12:44:58 +01:00
committed by Daniel Hellstrom
parent 7b8a920a27
commit c297060b11
1 changed files with 3 additions and 0 deletions
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c/src/lib/libbsp/sparc/shared/can/grcan.c
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@@ -1612,13 +1612,16 @@ int grcan_set_rxcomplete(void *d, int complete)
int grcan_get_stats(void *d, struct grcan_stats *stats) int grcan_get_stats(void *d, struct grcan_stats *stats)
{ {
struct grcan_priv *pDev = d; struct grcan_priv *pDev = d;
SPIN_IRQFLAGS(oldLevel);
FUNCDBG(); FUNCDBG();
if ( !stats ) if ( !stats )
return -1; return -1;
SPIN_LOCK_IRQ(&pDev->devlock, oldLevel);
*stats = pDev->stats; *stats = pDev->stats;
SPIN_UNLOCK_IRQ(&pDev->devlock, oldLevel);
return 0; return 0;
} }