redonkable/alistair23-linux
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RDMA/ocrdma: Fix a crash in rmmod

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1) ocrdma_remove_free() is called from a call_rcu callback funtion
   context, which can be a bottom-half context. So the code in
   ocrdma_remove_free should not sleep.

   But ocrdma_cleanup_hw() can sleep, So move it ocrdma_remove()
   instead of ocrdma_remove_free.

2) Fix a couple of kbuild test robot warnings.

Signed-off-by: Naresh Gottumukkala <bgottumukkala@emulex.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Naresh Gottumukkala 2013-09-06 15:02:47 +05:30 committed by Roland Dreier
parent 6ebacdfc07
commit 1852d1da3b
3 changed files with 32 additions and 30 deletions
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53
drivers/infiniband/hw/ocrdma/ocrdma.h
View file

@ -122,6 +122,32 @@ struct mqe_ctx {
bool cmd_done;
};
struct ocrdma_hw_mr {
u32 lkey;
u8 fr_mr;
u8 remote_atomic;
u8 remote_rd;
u8 remote_wr;
u8 local_rd;
u8 local_wr;
u8 mw_bind;
u8 rsvd;
u64 len;
struct ocrdma_pbl *pbl_table;
u32 num_pbls;
u32 num_pbes;
u32 pbl_size;
u32 pbe_size;
u64 fbo;
u64 va;
};
struct ocrdma_mr {
struct ib_mr ibmr;
struct ib_umem *umem;
struct ocrdma_hw_mr hwmr;
};
struct ocrdma_dev {
struct ib_device ibdev;
struct ocrdma_dev_attr attr;
@ -169,7 +195,7 @@ struct ocrdma_dev {
struct list_head entry;
struct rcu_head rcu;
int id;
u64 stag_arr[OCRDMA_MAX_STAG];
struct ocrdma_mr *stag_arr[OCRDMA_MAX_STAG];
u16 pvid;
};
@ -294,31 +320,6 @@ struct ocrdma_qp {
u16 db_cache;
};
struct ocrdma_hw_mr {
u32 lkey;
u8 fr_mr;
u8 remote_atomic;
u8 remote_rd;
u8 remote_wr;
u8 local_rd;
u8 local_wr;
u8 mw_bind;
u8 rsvd;
u64 len;
struct ocrdma_pbl *pbl_table;
u32 num_pbls;
u32 num_pbes;
u32 pbl_size;
u32 pbe_size;
u64 fbo;
u64 va;
};
struct ocrdma_mr {
struct ib_mr ibmr;
struct ib_umem *umem;
struct ocrdma_hw_mr hwmr;
};
struct ocrdma_ucontext {
struct ib_ucontext ibucontext;

7
drivers/infiniband/hw/ocrdma/ocrdma_main.c
View file

@ -452,9 +452,6 @@ static void ocrdma_remove_free(struct rcu_head *rcu)
{
struct ocrdma_dev *dev = container_of(rcu, struct ocrdma_dev, rcu);
ocrdma_free_resources(dev);
ocrdma_cleanup_hw(dev);
idr_remove(&ocrdma_dev_id, dev->id);
kfree(dev->mbx_cmd);
ib_dealloc_device(&dev->ibdev);
@ -470,6 +467,10 @@ static void ocrdma_remove(struct ocrdma_dev *dev)
spin_lock(&ocrdma_devlist_lock);
list_del_rcu(&dev->entry);
spin_unlock(&ocrdma_devlist_lock);
ocrdma_free_resources(dev);
ocrdma_cleanup_hw(dev);
call_rcu(&dev->rcu, ocrdma_remove_free);
}

2
drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
View file

@ -2839,7 +2839,7 @@ struct ib_mr *ocrdma_alloc_frmr(struct ib_pd *ibpd, int max_page_list_len)
goto mbx_err;
mr->ibmr.rkey = mr->hwmr.lkey;
mr->ibmr.lkey = mr->hwmr.lkey;
dev->stag_arr[(mr->hwmr.lkey >> 8) & (OCRDMA_MAX_STAG - 1)] = (unsigned long) mr;
dev->stag_arr[(mr->hwmr.lkey >> 8) & (OCRDMA_MAX_STAG - 1)] = mr;
return &mr->ibmr;
mbx_err:
ocrdma_free_mr_pbl_tbl(dev, &mr->hwmr);