If processes are blocked on device drivers (returning SUSPEND),

unblock the processes when the device drivers die.

diff --git a/servers/fs/misc.c b/servers/fs/misc.c
index 5841a4d05ff6296365bf97bf88dd8ccfee0aec68..5bfbf1d566d9d052167ccd724940aae6ef04a7e4 100644 (file)
--- a/servers/fs/misc.c
+++ b/servers/fs/misc.c
@@ -339,8 +339,11 @@ PUBLIC int do_exit()
   fp->fp_rootdir = NIL_INODE;
   fp->fp_workdir = NIL_INODE;
 
-  /* If a driver exits, unmap its entries in the dmap table. */
+  /* If a driver exits, unmap its entries in the dmap table.
+   * Also check if any process is SUSPENDed on it.
+   */
   dmap_unmap_by_proc(exitee);
+  unsuspend_by_proc(exitee);
 
   /* If a session leader exits then revoke access to its controlling tty from
    * all other processes using it.

diff --git a/servers/fs/pipe.c b/servers/fs/pipe.c
index bb9f9341ccf66c60aec2829f2aa1f5bbc9fc7968..ec9855f51afd3652c2a922c848df61ee6fafc263 100644 (file)
--- a/servers/fs/pipe.c
+++ b/servers/fs/pipe.c
@@ -194,6 +194,25 @@ int task;                  /* who is proc waiting for? (PIPE = pipe) */
   }
 }
 
+/*===========================================================================*
+ *                             unsuspend_by_proc                            *
+ *===========================================================================*/
+void unsuspend_by_proc(int proc)
+{
+  struct fproc *rp;
+  int client = 0;
+
+  /* Revive processes waiting for drivers (SUSPENDed) that have
+   * disappeared with return code EIO.
+   */
+  for (rp = &fproc[0]; rp < &fproc[NR_PROCS]; rp++, client++)
+       if(rp->fp_suspended == SUSPENDED && rp->fp_task == -proc)
+               revive(client, EIO);
+
+  return;
+}
+
+
 /*===========================================================================*
  *                             release                                      *
  *===========================================================================*/

diff --git a/servers/fs/proto.h b/servers/fs/proto.h
index f41315cbb1aec720769187d7097bbc9a4ba6cacc..474880e3295e52b965543bd84491198877564796 100644 (file)
--- a/servers/fs/proto.h
+++ b/servers/fs/proto.h
@@ -15,7 +15,6 @@ _PROTOTYPE( void free_zone, (Dev_t dev, zone_t numb)                  );
 _PROTOTYPE( struct buf *get_block, (Dev_t dev, block_t block,int only_search));
 _PROTOTYPE( void invalidate, (Dev_t device)                            );
 _PROTOTYPE( void put_block, (struct buf *bp, int block_type)           );
-_PROTOTYPE( void rw_block, (struct buf *bp, int rw_flag)               );
 _PROTOTYPE( void rw_scattered, (Dev_t dev,
                        struct buf **bufq, int bufqsize, int rw_flag)   );
 
@@ -127,6 +126,7 @@ _PROTOTYPE( void suspend, (int task)                                        );
 _PROTOTYPE( int select_request_pipe, (struct filp *f, int *ops, int bl)        );
 _PROTOTYPE( int select_cancel_pipe, (struct filp *f)                   );
 _PROTOTYPE( int select_match_pipe, (struct filp *f)                    );
+_PROTOTYPE( void unsuspend_by_proc, (int)                              );
 
 /* protect.c */
 _PROTOTYPE( int do_access, (void)                                      );