diff options
Diffstat (limited to 'drivers/net/sfc/falcon_io.h')
| -rw-r--r-- | drivers/net/sfc/falcon_io.h | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/net/sfc/falcon_io.h b/drivers/net/sfc/falcon_io.h index c16da3149fa9..8883092dae97 100644 --- a/drivers/net/sfc/falcon_io.h +++ b/drivers/net/sfc/falcon_io.h @@ -238,18 +238,21 @@ static inline void falcon_writel_page(struct efx_nic *efx, efx_dword_t *value, /* Write dword to Falcon page-mapped register with an extra lock. * * As for falcon_writel_page(), but for a register that suffers from - * SFC bug 3181. Take out a lock so the BIU collector cannot be - * confused. */ + * SFC bug 3181. If writing to page 0, take out a lock so the BIU + * collector cannot be confused. + */ static inline void falcon_writel_page_locked(struct efx_nic *efx, efx_dword_t *value, unsigned int reg, unsigned int page) { - unsigned long flags; + unsigned long flags = 0; - spin_lock_irqsave(&efx->biu_lock, flags); + if (page == 0) + spin_lock_irqsave(&efx->biu_lock, flags); falcon_writel(efx, value, FALCON_PAGED_REG(page, reg)); - spin_unlock_irqrestore(&efx->biu_lock, flags); + if (page == 0) + spin_unlock_irqrestore(&efx->biu_lock, flags); } #endif /* EFX_FALCON_IO_H */ |