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Crypto: chelsio - Fixes a hang issue during driver registration 

commit ad59ddd02d upstream.

This issue occurs only when multiadapters are present. Hang
happens because assign_chcr_device returns u_ctx pointer of
adapter which is not yet initialized as for this adapter cxgb_up
is not been called yet.

The last_dev pointer is used to determine u_ctx pointer and it
is initialized two times in chcr_uld_add in chcr_dev_add respectively.

The fix here is don't initialize the last_dev pointer during
chcr_uld_add. Only assign to value to it when the adapter's
initialization is completed i.e in chcr_dev_add.

Fixes: fef4912b66 ("crypto: chelsio - Handle PCI shutdown event").

Signed-off-by: Ayush Sawal <ayush.sawal@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5.4-rM2-2.2.x-imx-squashed
Ayush Sawal 2020-03-30 20:48:52 +05:30 committed by Greg Kroah-Hartman
parent b0946b45b8
commit ec9cf8afcd
1 changed files with 0 additions and 2 deletions
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2
drivers/crypto/chelsio/chcr_core.c
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@ -125,8 +125,6 @@ static void chcr_dev_init(struct uld_ctx *u_ctx)
atomic_set(&dev->inflight, 0);
mutex_lock(&drv_data.drv_mutex);
list_add_tail(&u_ctx->entry, &drv_data.inact_dev);
if (!drv_data.last_dev)
drv_data.last_dev = u_ctx;
mutex_unlock(&drv_data.drv_mutex);
}